INNOVATIVE, AIRTIGHT, SECURE — The Lid by Radon Home Defence provides the ultimate safeguard for your home’s indoor air quality and energy efficiency. Specifically engineered as an airtight cover for backwater valve access boxes, The Lid ensures complete air barrier continuity where it is needed most. By creating a flawless seal, it prevents dangerous radon gas from infiltrating the basement and stops costly energy loss through the foundation. Measuring 19 in. x 15 in. x 1.5 in. thick, this durable cover is designed for a precise, secure fit. The Lid is the essential, next-generation defence for maintaining a safe, healthy, and energy-efficient home environment.
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